JP2018150138A - Work gondola - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a work gondola capable of improving work efficiency by facilitating movement in an expanded space between work floors.SOLUTION: A floor plate 51 constituting a sub-work floor which can be brought close to/away from a running board 29 constituting a main work floor is provided. A running board 66 constituting an interposition work floor is provided between the running board 29 and the floor plate 51. The running board 66 is provided between lower parts of vertical links 26 of a pair of 4-joint link mechanisms. When the floor plate 51 is moved away from the running board 29, the running board 66 is stepped by operations of the 4-joint link mechanisms.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a work gondola provided at the tip of a boom of an aerial work vehicle.

  Patent Document 1 discloses a work gondola mounted on the tip of a boom of an aerial work vehicle. In such a work gondola, it is preferable that the work floor can be enlarged for the purpose of widening the work range.

JP 2006-225054 A

  However, in a configuration in which the work floor can be enlarged by providing another work floor in addition to the main work floor, the movement of the worker to another work floor separated from the main work floor is not possible due to the enlargement of the work floor. May be difficult. Therefore, it is not possible to secure a sufficient expanded area as a work floor.

  An object of the present invention is to provide a work gondola that allows an operator to easily move even if the work floor is greatly enlarged.

  In order to achieve the above object, in the present invention, a sub work floor is provided that can be moved closer to and away from the main work floor, and between the two work floors, An intervening work floor located at is provided.

  Therefore, even in a state where the work floor is greatly enlarged in the work gondola, the worker can move between the main work floor and the sub work floor through the intervening work floor without any trouble, and efficient work can be performed. It becomes possible.

  According to the present invention, even if the work floor is greatly enlarged, the operator can easily move on the work floor, and the work efficiency can be improved.

The side view of the aerial work vehicle provided with the work gondola of 1st Embodiment. The perspective view of the work gondola in a flat state. The perspective view of the work gondola in a staircase state. The side view of the state which advanced the sub work floor. The side view which shows the state which advanced the sub work floor and was lowered | hung. The side view which shows the use condition of a work gondola. The side view of the work gondola of 2nd Embodiment. Sectional drawing of a working gondola. The side view which shows the state which lowered | hung the sub work floor of the front part, and moved the work floor of the rear part back. The side view which shows the state which moved the front side sub work floor forward and down, and moved the rear side work floor back and raised.

Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the work gondola 11 of this embodiment is embodied in an aerial work vehicle and is supported on a support base 14 at the tip of a boom 13 of a vehicle 12.

  That is, as shown in FIGS. 1 to 3, a base 21 of the work gondola 11 is fixed to the support base 14, and a pair of right and left support columns 22 are fixed upright on the base 21. It is reinforced. In this embodiment, the direction orthogonal to the paper surface in FIG. 1 is the left-right direction, and the left-right direction in FIG. 1 is the front-rear direction (the right side is the front). Three horizontal links 24 are rotatably supported by a shaft 25 at the front end at the lower end portion, the middle portion, and the upper end portion of both struts 22, respectively. Four vertical links 26 are rotatably supported on the horizontal link 24 by shafts 27 at front and rear positions and intermediate positions along the length direction of the horizontal link 24. Accordingly, the horizontal link 24 and the vertical link 26 constitute a pair of left and right main working unit four-bar link mechanisms (hereinafter referred to as main link mechanisms) 28. A tread plate 29 constituting a main work floor is fixed between the lower ends of the left and right vertical links 26. The lateral link 24 at the upper end has a handrail function.

  The footboard 29 at the rear end position of the lateral link 24 is provided with an extended footboard 31 that constitutes a main work floor together with the footboard 29. Handrails 321 and 322 are provided on the extended footboard 31 and the footboard 29 at the rear end. It has been.

  As shown in FIG. 6, a connecting member 33 is fixed between the left and right horizontal links 24 at the lower end. A first drive cylinder 34 is rotatably supported at the base end on the base 21, and the tip end of the piston rod is rotatably connected to the connecting member 33. Then, the main link mechanism 28 is rotated up and down through the connecting member 33 due to the piston rod appearing and retracting, and the tread plates 29 and 31 are aligned at substantially the same horizontal height by the link operation of the main link mechanism 28, or are stepped. Or are arranged.

  As shown in FIGS. 2 to 5, lateral guide cylinders 41 are fixed to the left and right sides of the base 21. The lateral guide cylinder 41 supports and supports guided portions 43 on both the left and right sides of the moving frame 42 so as to be movable back and forth. A second drive cylinder 44 is supported on the base 21, and its piston rod is connected to the moving frame 42, and the moving frame 42 is moved back and forth as the piston rod moves in and out.

A pair of left and right vertical guide portions 46 are fixed to the moving frame 42. A movable table 47 is guided to the vertical guide 46 so as to be moved up and down in a guided part 48.
A third drive cylinder 49 is supported on the moving frame 42, and its piston rod is connected to a moving table 47. The moving table 47 is moved up and down by the movement of the piston rod. The movable table 47 includes a floor plate 51 constituting a sub work floor, and a handrail 52 is provided on the outer periphery thereof.

  A horizontal link 61 extending in the direction of the moving frame 42 is rotatably supported by the shaft 62 at both upper and lower ends of the both columns 22, and a vertical link 63 is provided between the front ends and the middle portion of the upper and lower horizontal links 61. Is rotatably supported by a shaft 64. The horizontal link 61 and the vertical link 63 constitute a connection part four-bar link mechanism (hereinafter referred to as a connection part link mechanism) 65. In addition, although the horizontal link 61 located in the up-down direction intermediate part of the vertical link 63 is provided in the connection part link mechanism 65, this horizontal link 61 is not supported by the support | pillar 22.

  Between the lower ends of the left and right vertical links 63, a footboard 66 constituting an intervening work floor is fixed. A wheel 67 is attached to the lower end of both vertical links 63 on the front end side of the horizontal link 61, and the wheel 67 is installed on the floor plate 51. As the moving table 47 is raised and lowered, the connecting portion link mechanism 65 performs a link operation, and the tread board 66 is raised and lowered. At this time, the wheel 67 rolls on the floor board 51.

Next, the operation of the work gondola 11 of this embodiment will be described.
In FIG. 1 and FIG. 2, by driving the first drive cylinder 34, the tread plate 29 constituting the main work floor, the tread plate 66 constituting the intervening work floor, and the floor plate 51 constituting the sub work floor are approximately the same level. Aligned above. Therefore, in this state, the worker on the work gondola 11 is suitable for working on, for example, a flat ceiling surface of a building.

  In this state, when the piston rod 35 of the first drive cylinder 34 is protruded, the tread plate 29 and the extended tread plate 31 are stepped by the link operation of the main link mechanism 28 as shown in FIGS. Therefore, in this state, the worker on the work gondola 11 is suitable for working on a curved ceiling surface or side surface of a building, for example.

  As shown in FIG. 4, when the piston rod of the second drive cylinder 44 protrudes from the state of FIG. 1, the moving table 47 is moved forward together with the moving frame 42. At this time, since the wheel 67 of the connection portion link mechanism 65 maintains a fixed position and relatively rolls on the floor plate 51 on the moving base 47, the connection portion link mechanism 65 does not perform a link operation, and thus the current state. To maintain. Accordingly, the tread plate 66 of the connecting portion link mechanism 65 is interposed between the floor plate 51 moved forward and the tread plate 29 of the main link mechanism 28. For this reason, the area of the work gondola 11 can be increased, and the operator can easily move back and forth via the tread board 66 as an intervening work floor, so that work on a flat ceiling surface and the like can be performed efficiently. Can do.

  Further, as shown in FIGS. 5 and 6, when the piston rod of the third drive cylinder 49 protrudes from the state of FIG. 4, the moving table 47 is lowered. At the time of the lowering, the wheel 67 of the connection portion link mechanism 65 rolls on the floor plate 51, and the connection portion link mechanism 65 is linked downward by the weight of the connection portion link mechanism 65 and the footboard 66. For this reason, the step board 66 of the connection part link mechanism 65 is stepped, and is interposed between the step board 29 of the main link mechanism 28 and the floor board 51. Therefore, the work span in the vertical direction can be widened in addition to the front and rear direction of the work gondola 11, and even if the floor board 51 is lowered, the foot board 66 is interposed between the floor board 51 and the upper foot board 29 in a stepped manner. An operator can easily move in the vertical direction, and can efficiently perform work on a construction surface such as a tunnel inner surface that is curved up and down.

Therefore, this embodiment has the following effects.
(1) A tread board as an intervening work floor interposed so as to be continuous between a main work floor composed of the tread boards 29 and 31 and a floor board 51 as a sub work floor moved forward with respect to the main work floor. 66 is provided. Therefore, by moving the sub work floor forward, the plane area of the work gondola 11 can be expanded, and efficient work on the construction surface becomes possible.

  (2) A stair-like intervening work floor made up of stepping plates 66 can be interposed between the main work floor and the sub work floor moved downward. Therefore, even if the lowering stroke of the movable table 47 is increased, the operator can easily move up and down through the intervening work floor, and the lifting load can be suppressed. For this reason, the work span on the work gondola 11 can be easily expanded in the vertical direction, and efficient work can be performed as described above.

  (3) Since the horizontal link 61 at the upper end of the connecting portion link mechanism 65 also functions as a handrail, the operator can easily move between the main work floor and the sub work floor via the tread plate 66. it can.

(4) Since the structure for operating the tread board 66 as an intervening work floor in a stepped manner is a four-bar linkage mechanism, the structure is simple and there is almost no risk of malfunction.
Next, a second embodiment of the present invention will be described with reference to FIGS.

  In the present embodiment, as shown in FIGS. 7 and 8, the main work floor is constituted by a floor plate 71 fixed to the base 21. Handrails 72 are provided on the left and right sides of the floor board 71. The moving frame 42, the moving table 47, the four-bar linkage mechanism 65, and the like on the front side of the main work floor have the same configuration as in the first embodiment. However, in FIG. 7 to FIG. 10, a part of or a front part of the members such as the lateral guide cylinder 41 and the second drive cylinder 44 for guiding the moving table 47 is omitted.

  As shown in FIGS. 9 and 10, lateral guide cylinders 74 other than the lateral guide cylinder 41 (not shown) are fixed to both sides of the floor plate 71. The guided portion 76 of the rear moving frame 75 is guided and supported by the lateral guide cylinder 74 so as to be movable back and forth. A driving cylinder 77 is supported on the floor plate 71, and its piston rod 78 is connected to the rear moving frame 75, and the rear moving frame 75 is moved back and forth as the piston rod 78 moves in and out.

  The rear moving frame 75 is provided with a pair of left and right guided portions 81. The guided portion 81 supports and supports the vertical guide portion 79 of the moving table 80, and the vertical guide portion 79 and the guided portion 81 guide the elevation of the moving table 80.

  A driving cylinder 82 is supported by the vertical guide portion 79, and its piston rod 83 is connected to the rear moving frame 75, and the moving table 80 is raised and lowered by the protrusion and withdrawal of the piston rod 83. The moving table 80 includes a floor plate 84 as a sub moving floor, and a handrail 85 is provided on the outer periphery thereof.

  Supports 91 are vertically fixed on both sides of the front part of the moving table 80. A horizontal link 92 extending forward is rotatably supported by a shaft 93 at both upper and lower ends and an intermediate portion of both struts 91, and a vertical link 94 is rotated by a shaft 95 between front ends and intermediate portions of the upper and lower horizontal links 92. Supported as possible. The horizontal link 92 and the vertical link 94 constitute a connection part four-bar link mechanism 96. A tread plate 97 as an intervening work floor is fixed between the lower ends of the left and right vertical links 94. A wheel 98 is attached to the lower end of both vertical links 94 on the front end side of the horizontal link 92, and the wheel 98 is installed on the floor plate 84. Then, as the moving table 80 rises, the connecting portion four-bar linkage mechanism 96 performs a link operation, and the tread plate 97 is raised and becomes stepped. At this time, the wheel 98 rolls on the floor board 84.

The second embodiment operates as follows.
In FIG. 7, the front floor 51 is disposed at the upper position, the piston rods 78 and 83 of the drive cylinders 77 and 82 are in an immersive state, and the rear movable table 80 is at the lowered position. In this state, the front and rear floor boards 51, 71, 84 are in a state of being substantially horizontally aligned with a small height difference. Therefore, in this state, the worker on the work gondola 11 is suitable for working on, for example, a flat ceiling surface of a building.

In this state, when the piston rods of the first and second drive cylinders 34 and 44 are protruded, the same action as in the first embodiment is performed.
Further, in this state, as shown in FIG. 9, when the piston rod 78 of the drive cylinder 77 is projected, the movable table 80 is moved rearward. At this time, since the wheel 98 of the four-bar linkage mechanism 96 maintains a fixed position and rolls relatively on the floor plate 84, the four-bar linkage mechanism 96 maintains the current state without performing a link operation. Therefore, the tread plate 97 of the four-bar linkage mechanism 96 is interposed between the floor plate 84 and the floor plate 71 moved rearward. For this reason, the area of the work gondola 11 can be increased, and the worker can efficiently work on a flat ceiling surface or the like.

  Further, as shown in FIG. 10, when the piston rod 83 of the drive cylinder 82 is projected, the movable table 80 is raised. At the time of this ascent, the wheel 98 of the connection part four-bar linkage mechanism 96 rolls on the floor plate 84, and the connection part four-bar link mechanism 96 performs a downward link operation by the weight of the connection part four-bar link mechanism 96 and the tread board 97. Is done. For this reason, the step board 97 as an interposition work floor of the connection part four-bar linkage mechanism 96 becomes step shape, and is interposed between the floor boards 71 and 84. Therefore, the upper and lower work spans of the work gondola 11 can be widened, and even if the floor board 71 rises, the step board 97 is interposed between the floor boards 71 and 84, so that the operator can easily move in the vertical direction. It is possible to work efficiently on the construction surface curved up and down.

Therefore, in the present embodiment, substantially the same effect as that of the first embodiment can be obtained.
The present invention is not limited to the first and second embodiments, and can be embodied in the following modes.

-In 1st Embodiment, rear side structures, such as the four-bar linkage mechanism 96 similar to 2nd Embodiment, and the tread 97 as an interposition work floor, are provided also in the rear part side.
In the first and second embodiments, the moving directions of the front and rear moving frames 42 and 75 are reversed upside down.

  -Configure each link mechanism to be operated manually. In this case, a fixing means such as a pin for fixing each link mechanism at a predetermined movement position and a hole into which the pin is inserted is required.

  In place of the first drive cylinder 34, the second drive cylinder 44, and the third drive cylinder 49, other drive mechanisms such as a jack, a winch, a lever hoist, etc. are used. These mechanisms may be manual or electric. Alternatively, an electric or hydraulic motor may be used.

  DESCRIPTION OF SYMBOLS 11 ... Work gondola, 26 ... Vertical link, 28 ... Main work part four-bar link mechanism, 29 ... Tread board, 31 ... Extension tread board, 51 ... Floor board, 63 ... Vertical link, 66 ... Tread board, 65 ... Connection part four-bar link mechanism , 71 ... floor board, 84 ... floor board, 94 ... vertical link, 96 ... connection part four-bar link mechanism, 97 ... tread board.

Claims (5)

  A work gondola provided with a sub work floor that can be approached and separated from a main work floor, and an intermediate work floor located between the two work floors between the two work floors.   The sub work floor can be moved up and down with respect to the main work floor, a pair of four-bar link mechanisms are provided between both sides of the both work floors, and the intervening work floor is provided between the both four-bar link mechanisms. The work gondola described in 1.   The work gondola according to claim 2, wherein the intervening work floor is fixed between lower end portions of vertical links of the four-joint link mechanisms.   The work gondola according to claim 2 or 3, wherein the sub work floor is provided at one end portion of the main work floor so as to be lowered, and the sub work floor is provided at the other end portion of the main work floor so as to be raised.   The link at one end of the four-bar linkage mechanism is fixed to one work floor, and the link at the other end is supported so as to be relatively movable on the sub work floor or the main work floor. The working gondola according to one item.